Date relationships between four separate tables

I have five separate tables each with a column 'Created'

This column tells us when each row was created in <dd/mm/yy> format.

I want to create a bar graph that tells us how many rows were created and on which days whilst still categorising by table. I have attached a screenshot below to better illustrate what I'm looking for:

I'm using the date created as the axis and using the same value to provide the count (values).

The date axis in the photo is currently running from one column on one table. I'm unsure how to create a relationship where by the axis will take into account all of the dates across all 5 tables.

Help would be much appreciated